Steps to reproduce:

1. Under Configuration, actions, select "Discovery Actions", then Create a new action
2. Add a condition for "Uptime/downtime" "is less than" and:
3. Type a timespec like "3w", and hit "Add"
4. Back on the main condition screen, you'll see that the "3w" trimmed off the "w" turning your "3 weeks" into "3 seconds"

Result:

then

--> Upon further inspection, this change seems to happen when the cursor moves away from the "Value" field - so it may be a validation problem instead of storage problem.   But either way, it means the user has to calculate the number of seconds in 3 weeks to get the desired outcome.

Expected:
I expect to see "3w" back on the main "Add" display.