Audio/Video de-sync suddenly, just after a short pause (video sample clip available)

Streamia.gr

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System: Windows 11
OBS: 27.1.3 64bit
Audio/Video input: Blackmagic Design ATEM Mini Extreme ISO

Description:
While recording and after 1:38', I noticed a sudden pause of audio/video.
After that, audio and video is de-synced. Happened twice during the day.
Sample clip: https://youtu.be/70baDD3ZZa4 (at 00:02").
Original video file name: 2022-01-22 09-02-33.mkv
Log file: There are no entries at the specific time. Actually, there are no entries at all because scene changes controlled directly by the ATEM device. This is the part we are interested in:
09:02:33.439: ==== Recording Start ===============================================
09:02:33.439: [ffmpeg muxer: 'adv_file_output'] Writing file 'C:/Users/asidi/Videos/2022-01-22 09-02-33.mkv'...
<incident happened in this time period>
10:41:17.556: Audio monitoring device:
10:41:17.556: name: Default
10:41:17.556: id: default
10:41:17.580: Settings changed (advanced)
10:41:17.580: ------------------------------------------------
10:41:23.172: Audio monitoring device:
10:41:23.172: name: Ηχεία (Realtek(R) Audio)
10:41:23.172: id: {0.0.0.00000000}.{4c27a491-f0fd-4ca4-88b9-5a7cd84e8d56}
10:41:23.187: Settings changed (advanced)
and full log file can be found attached.

Note:
I searched and found a lot of threads related to audio/video de-sync but none similar to this.
 

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