Hello, @nop_head!
It seems like the yellow checks were an after effect of a bigger bug where things were changed 1-way to 2-way sync. This bigger bug was caused by the unsync-delete behavior introduced in 3.6.1 (see here), which was improved in 3.7.3 as a setting instead.
I hope this tidbit helps! And noted on your feedback to auto-retry the red icon - let me see how we can tackle this!