Splits are not properly preserved after saving an expense

[alexanderstumpf-energyrobotics]

Describe the bug
Expenses are sometimes numerical converted to a weird number of shares, see screenshot.

To Reproduce
Steps to reproduce the behavior:

1. Add new expense in a group
2. Set a split, e.g. 2 - 3
3. Save
4. Go back to main page
5. Reopen your expense
6. There is a certain chance that your split has been converted numerical, while the ratio is retained

Expected behavior
Keep the split as given

Screenshots

App version
2.1.5

Desktop (please complete the following information):

• Win11
• Firefox