Exercise creation: Newly added muscles are not available in the dropdown

[seyfeb]

Steps to Reproduce

1. .Go to muscle overview and add a new muscle.
2. Go to exercise creation and open the muscle-selection dropdown.

Expected results:

New muscle should be available for selection.

Actual results:

Muscle not shown

wger version 2.3.0a2

[seyfeb]

It seems like, maybe all, at least some muscles became available. Maybe the issue was due to some caching? At least the user experience would be improved if the muscles were available immediately.

I don't know if this is the typical user flow: I wanted to add an exercise and noticed that muscles are trained that are not yet available. So I added the muscle and tried to create the exercise again with the newly added muscle still unavailable.

[seyfeb]

Another update:

Some newly created muscles appeared but other (initially present) muscles disappeared from the exercise creation dropdown: I am not able to select trapezius and triceps muscles anymore.