Encrypted folder(s) on Windows reported as "Unexpected Objects"

[frlu05]

Setup

• 1 Intel laptop PC with 64 bit Windows 10
• 1 Raspberry Pi 4 with Rasbian 32-bit Linux
• Both devices running Syncthing 1.15.1

Scenario, how to reproduce

• Sharing folder from RPI4/Linux32 (T1) with psw to Intel/Win64 (U1)
• Adding folder to U1 (i.e. ReceiveEncrypted)
• Waiting for first sync to complete on U1 - Works fine!
• Initiate a second scan, re-sync, at U1 (e.. by re-scan folder, restart syncthing or pause/resume device) - All second level folders at U1 (i.e. including a backslash) is reported as "Unexpected items"

Sharing the other way around, i.e. with Intel/Win64 as Trusted and RPI4/Linux32 as Untrusted/encrypted works fine, not showing this issue.