ScanSnap scans not appearing in DT intermittently v3.5.1

A notification appears that my scan is being sent to DT, but it never appears in the program. Usually I see a pop up window where I can edit keywords, but about 1/2 the time I’m not seeing the window, nor am I seeing the scan in the in box.
If I reboot DT the problem seems to correct itself, at least temporarily.

I’m also noting that sometimes it’s difficult to access an open DT window on my Mac, even though the program is running. I have to use the menu bar app to open a window. Not sure if that is a related problem.
I just updated to 3.5.1 and this particular problem appeared afterwords. Here’s the information on my system:

macOS: Version 10.14.6 (Build 18G103)
Model: iMac18,3
RAM: 24 GB, Processors: 4

Startup Volume: APFS - 520 GB of 1 TB free
Installation Path: /Applications/DEVONthink
Home Directory: /Users/williamalpert

~/Library/Application Support/DEVONthink 3/Inbox.dtBase2 (“Inbox”):
54178 unique words, 773628 total words (max. 118977, xml), 837 items, 1.3 GB (max. 44.2 MB, wav)
~/Documents/DEVONTHINK PRO/Music.dtBase2 (“Music”):
14958 unique words, 195222 total words (max. 33321, pdf), 270 items, 382.1 MB (max. 82.6 MB, rtfd)
~/Documents/DEVONTHINK PRO/Personal.dtBase2 (“Personal”):
35735 unique words, 1236106 total words (max. 61013, pdf), 845 items, 797.4 MB (max. 36.6 MB, pdf)
~/Documents/DEVONTHINK PRO/Real Estate.dtBase2 (“Real Estate”):
16486 unique words, 350290 total words (max. 9423, pdf), 645 items, 354.2 MB (max. 6.5 MB, pdf)

Sync Locations:
iCloud Drive (Devon_Think_Data </Users/billalpert/Library/Mobile Documents/com~apple~CloudDocs/DEVONthink Packet Sync>)
Dropbox (Devon_Pro_Office_Sync.dtCloud <>)
iCloud (iCloud </Users/williamalpert/Library/Mobile Documents/iCloud~679S2QUWR8~com~devon-technologies~sync>)

Hold the Option key and choose Help > Report bug to start a support ticket.
This way we can handle this in support and have the logs, etc. Thanks!