Filesystem lookups only (0 db lookups and 0 db updates)

After the initial installation everything was fine.
For example, I was seeing “Indexing of “C” done. 4 filesystem lookups 20882 db lookups and 4 db updates” which was good.

Trying to make the indexing faster, for testing, (after i read this Indexing forever - stuck in Indexing Hell - #11 by urbackupisgreat) i unchecked and then rechecked “Allow files on this drive to have contents indexed” check box in the partition properties. Theoretically, the check mark is for windows searching, but after that, every time the indexing takes longer and i see “Indexing of “C” done. 20886 filesystem lookups 0 db lookups and 0 db updates

I try:
cleanup
deleted and reinstalled the client
chkdsk
fsutil usn deletejournal /n c:
vssadmin delete shadows /all
rebuild search index etc.

I use internet mode only. Gigabit local network.
This behavior is only for one client on partition c (where i changed ckeck box).
Why all 20882 lookups are filesystem lookups and “0 db lookups and 0 db updates” (no db lookups)?
How can I return to the initial behavior?
Thank you very much!

Today log:

|Info|08/30/23 10:16|Starting scheduled incremental file backup…
|Info|08/30/23 10:22|Scanning for changed hard links on volume of "C:"…
|Info|08/30/23 10:22|Indexing of “C” done. 20886 filesystem lookups 0 db lookups and 0 db updates
|Info|08/30/23 10:22|Scanning for changed hard links on volume of "D:"…
|Info|08/30/23 10:22|Indexing of “D” done. 1 filesystem lookups 8227 db lookups and 1 db updates
|Info|08/30/23 10:22|Scanning for changed hard links on volume of "E:"…
|Info|08/30/23 10:22|Indexing of “E” done. 1 filesystem lookups 24319 db lookups and 1 db updates
|Info|08/30/23 10:22|Laur-PC: Loading file list…
|Info|08/30/23 10:22|Laur-PC: Calculating file tree differences…
|Info|08/30/23 10:22|Laur-PC: Calculating tree difference size…
|Info|08/30/23 10:22|Laur-PC: Linking unchanged and loading new files…
|Info|08/30/23 11:20|Waiting for parallel hash load stream to finish
|Info|08/30/23 11:20|Parallel hash loading finished successfully
|Info|08/30/23 11:20|Waiting for file transfers…
|Info|08/30/23 11:20|Waiting for file hashing and copying threads…
|Info|08/30/23 11:20|Writing new file list…
|Info|08/30/23 11:20|All metadata was present
|Info|08/30/23 11:20|Number of re-added file entries is 62240
|Info|08/30/23 11:20|Transferred 141.597 MB - Average speed: 344.072 KBit/s
|Info|08/30/23 11:20|283.132 KB of files were already present on the server and did not need to be transferred
|Info|08/30/23 11:20|Time taken for backing up client Laur-PC: 1h 3m 36s
|Info|08/30/23 11:20|Backup succeeded

I have a lot of “DEBUG Skip phash for id” in the log file, if it matters…
@Uroni said somewhere:

I suppose it has something to do with what is happening to me

No help? @Uroni … anyone?..