I’m having the very same problem. Starting with 1.4.11 my Folders on the Cryptomator-Virtualdrive are empty, even the whole drive disappears.
I just mounted it and the driver letter was there, I could see folders. After a few seconds it disappeards.
In other cases I could work with it for half a minute and store or move files before it disappeared.
In the debuglog I can see these entries repeating:
11:06:27.378 [Thread-1262] TRACE o.c.frontend.dokany.ReadWriteAdapter - Try to open / as Directory.
11:06:27.379 [Thread-1262] TRACE o.c.frontend.dokany.ReadWriteAdapter - (130) / opened successful with handle 130.
11:06:27.379 [Thread-1264] TRACE o.c.frontend.dokany.ReadWriteAdapter - (130) getFileInformation() is called for /.
11:06:27.380 [Thread-1264] TRACE o.c.frontend.dokany.ReadWriteAdapter - (130) File Information successful read from /.
11:06:27.381 [Thread-1268] TRACE o.c.frontend.dokany.ReadWriteAdapter - (130) cleanup() is called for /.
11:06:27.382 [Thread-1270] TRACE o.c.frontend.dokany.ReadWriteAdapter - (130) closeFile() is called for /.
11:06:27.382 [Thread-1272] TRACE o.c.frontend.dokany.ReadWriteAdapter - zwCreateFile() is called for / with CreationDisposition OPEN_EXISTING.
11:06:27.382 [Thread-1272] TRACE o.c.frontend.dokany.ReadWriteAdapter - Try to open / as Directory.
11:06:27.382 [Thread-1272] TRACE o.c.frontend.dokany.ReadWriteAdapter - (131) / opened successful with handle 131.
11:06:27.383 [Thread-1274] TRACE o.c.frontend.dokany.ReadWriteAdapter - (131) getFileInformation() is called for /.
11:06:27.383 [Thread-1274] TRACE o.c.frontend.dokany.ReadWriteAdapter - (131) File Information successful read from /.
11:06:27.384 [Thread-1278] TRACE o.c.frontend.dokany.ReadWriteAdapter - (131) cleanup() is called for /.
11:06:27.385 [Thread-1281] TRACE o.c.frontend.dokany.ReadWriteAdapter - (131) closeFile() is called for /.
11:06:27.385 [Thread-1282] TRACE o.c.frontend.dokany.ReadWriteAdapter - zwCreateFile() is called for / with CreationDisposition OPEN_EXISTING.
11:06:27.385 [Thread-1282] TRACE o.c.frontend.dokany.ReadWriteAdapter - Try to open / as Directory.
11:06:27.385 [Thread-1282] TRACE o.c.frontend.dokany.ReadWriteAdapter - (132) / opened successful with handle 132.
11:06:27.386 [Thread-1284] TRACE o.c.frontend.dokany.ReadWriteAdapter - (132) getFileInformation() is called for /.
11:06:27.386 [Thread-1284] TRACE o.c.frontend.dokany.ReadWriteAdapter - (132) File Information successful read from /.
11:06:27.387 [Thread-1288] TRACE o.c.frontend.dokany.ReadWriteAdapter - (132) cleanup() is called for /.
11:06:27.388 [Thread-1290] TRACE o.c.frontend.dokany.ReadWriteAdapter - (132) closeFile() is called for /.