Accessing my Samba shares causes Mint to kick my Windows machine out of the share

[laxinthe303]

Fresh install of Mint, freshly installed hard drives, new shares in Windows.

I created the shares via the "Share" tab in Nemo, with both the allow others to create and delete files in this folder, and guest access checked.

I can see the drives in Windows, and they are mounted as network drives.

I can write to the drives, significant amounts of data.

However, sometimes just browsing the drives, or accessing them, will cause the connection to drop on the Windows side. I get an "A:\ is not accessible. The parameter is incorrect error."

Windows then cannot see the share, until some time has passed, or until I restart Windows and it reconnects to the drive.

[laxinthe303]

OK, I have identified the problem, but not the solution.

Locked files:
Pid User(ID) DenyMode Access R/W Oplock SharePath Name Time
--------------------------------------------------------------------------------------------------
509416 65534 DENY_NONE 0x100081 RDONLY NONE /media/veracrypt1 Downloads Sat Mar 16 13:25:27 2024

Samba is locking my Downloads directory, and this has only happened in Mint, it doesn't happen in my Ubuntu boxes, and it only happens when I'm trying to access a bunch of files in a short period of time, whether that's looking at a bunch of images in sequence, OR when I'm trying to write a bunch of files. Writing under 10 files at once, no problem, writing 100 files at once, lock.

Is there a way to prevent this behavior? I presume it's trying not to overload my disk - but this same setup worked fine for years on Ubuntu.