I recently noticed this as well. I have one note for my to do list which I have open all the time in Chrome. Also seeing this in Chome console:
en-dashboard: 0.0.66
main.40143870b63039c22292.js:1 ion:rpc:notestore:getFilteredSyncChunk a
(anonymous) @ main.40143870b63039c22292.js:1
main.40143870b63039c22292.js:1 ion:rpc:notestore:getFilteredSyncChunk a
(anonymous) @ main.40143870b63039c22292.js:1
main.40143870b63039c22292.js:1 ion:actions:catchupStragglers catchup failed for notebooks Array(1)