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And more importantly how to recover the table back? If you have previously made a backup of the partition table as I described above, then it is not difficult to restore the partition table. I described all this above. But if you do not make a backup of the partition table in advance, then you will have to use the programs to find and restore partitions: Acronis Disk Director, testdisk, etc. In any case, this is an extremely risky task caused by this terrible bug, which needs to be fixed urgentl...

I do not think this is normal. And I think that this is unlikely to be due to RAM, at least I did not notice a significant RAM consumption when using VeraCrypt. But I do not know how much memory you have and how much free memory. But I can assume that the problems with mounting are due to conflicts with the letters of the disks. Maybe when mounting you use the same letter that is already used by an external disk or a USB stick?

I created a ticket about this problem, but it seems that nobody reacts to the ticket section, so I decided to mention it here: https://sourceforge.net/p/veracrypt/tickets/201/ In short: every time I expand an encrypted partition, my partition table breaks. If someone came across this problem and knows its solution, I would be very glad to know it.

I'm not a VeraCrypt developer. If I understand correctly, then you have an encrypted partition on the disk (not a file container). It is possible that Windows once offered to "initialize" the partition, because it did not see a file system on it. Thus, Windows could damage the VeraCrypt headers, which are stored at the beginning and at the end of the partition. If you did not backup the VeraCrypt headers, then probably the data will not be restored. First of all, you should make an image of the whole...

Have you tried to specify a specific version of PFR (SHA-512, etc) before mount? And, as far as I know, using the PIM parameter, you can adjust the number of iterations used to verify the password / keyfile. The smaller the value, the faster the check (and less secure). https://www.veracrypt.fr/en/Personal%20Iterations%20Multiplier%20(PIM).html

Did you install VeraCrypt from the repository ppa:unit193/encryption?

I'm not a VeraCrypt developer, but first I can advise you to make a full flash drive image via dd or another program, so as not to lose the stored data.

And in general, it's very strange that VeraCrypt makes some changes in the partition table, because it is NOT NECESSARY to do this. The partition is already extended with cfdisk (because VeraCrypt can not do this itself). Therefore, VeraCrypt need only fill this partition with random data and increase the file system inside it. Why does VeraCrypt interfere with the partition table?