Yes, you are not alone with this problem, it happens to me as well.

Usually switching from turn-based mode to real-time (I didn't need to unpause) and then back to turn-based mode again seems to work for me; though recently I had to do this multiple times for the frightened party member to complete his frightened run and end his turn naturally.

Glad it's not just me.
I did try the switching back and forth which mostly worked but there was one occasion where Linzi just continued to run indefinitely and never ended her turn. I had to abort the game.
I imagine Owlcat are aware of this issue and it will be addressed eventually.

Confirming this issue, it is kind of a game breaking bug when playing in TB mode.
As already mentioned above, a possible workaround is to temporarily switch to RTwP and wait until the effect (e.g. frightened) disappears. The problem with this approach is that it breaks the ideea of TB for the duration of the issue.

Off topic: another new bug int 2.1.0k: whenever the inventory / map / etc. is opened, the left side bar appears and it cannot be closed by just pressing the (<) button, it has to be dragged with the mouse to the left to close it. While not game breaking is pretty annoying.

Edit: indeed both issue are happening in "k" version only.

I have also run into this annoying bug/issue.

I do use the left panel for organizing skill/spells/abilities for different party members, but when it gets stuck like that I just click on one of the party members portraits to clear it.

Oh...and today I learned that you can click and drag those left-side bars, rather than clicking the arrow multiple times to hide or reveal them, cheers!

I have fired of a heads up to Owlcat about this 'frightened' issue.
They may well be already aware of it but just in case...

Excellent, thank you.

Both issues fixed in 2.1.1.
Many thanks to Owlcat.
The continuous (and prompt) support they're offering for their product makes me a happy customer (I'm looking forward to buying new games from them).

Update 2.1.1 – September 1, 2020

Please be aware of plot spoilers in the description below!

* It was possible to enter the locations that required certain companions even if you had no such companions in your party. Resolution: fixed. If you are stuck in such a location, try loading an autosaved game before entering the area.
There were some incorrect ways of exiting the location with the Everblooming Flower in the Other World. Resolution: fixed.
* Zombies in Vordakai’s Tomb failed to use weapons. Resolution: fixed.
* Fixed the issues with Nereids’ aura in the game saves.
* The alchemists could use Fast Bombs as a standard action. Resolution: fixed.
*The kineticist’s Shroud of Water ability worked incorrectly. Resolution: fixed.
* In turn-based mode, it was possible to use a character’s ability by pressing a hotkey while the character was moving. Resolution: fixed.
* The smart cursor failed to suggest making a full attack automatically after a 5-ft. step even when it was possible. Resolution: fixed.
* Frightened characters couldn’t take actions in their turn in turn-based mode. Resolution: fixed.
* Now the effect duration is displayed in rounds in turn-based combat.
* Fixed the Necklace of Double Crosses.
* The page for the Illusion school of magic was empty. Resolution: fixed.
* Sometimes the side panel could stop responding and wouldn’t hide. Resolution: fixed.
* The number of available quicksaves and autosaves was set to 1.
* Some combat log notifications about spell immunity have been localized.


A friendly reminder: while we deeply admire the contribution that mod authors make to our game, we would like you to remember that running custom modifications can lead to unexpected bugs and crashes. Unfortunately, if you encounter any issues while playing with mods, our team will not be able to help you. If this happens, please report these issues to the mod's original creator. Also, remember that after each game update, there is a high probability of previously installed mods not functioning properly.

Brilliant. I'll go to 2.1.1
Many thanks to Owlcat if they see this.