I’m having the same issue on build 0.13.19.
Of the commonly sited plug-ins that may be related to the bug, I DO NOT have the Day Planner plug-in installed, but do have Daily Notes and Calendar. I am sync’ing via iCloud between iPad and Windows 10. I also have directory structure and Files settings in such a way the Obsidian and Logseq can sync with each other.
The bug still persists on the PC despite me having Logseq closed and Obsidian on iPad closed. However, on the iPad, there appears to be no bug.
This suggests that the bug occurs under varying conditions, and, in my case, syncing via iCloud may trigger.