**Issue**
Problem seems to be happening when you have a lot of missions subscribed on steam workshop.
Scenario display shows only 50 missions max. After that random missions disappear from the list. The more missions you subscribe, the more of them disappear (stays hidden).
**Suggestion**
Increase the limit at least to 200 missions pretty please. Infinite would be the best but i can imagine that´s not possible.
**Conclusion:**
When you subscribe to more than 50 missions, then all missions that are above limit starts to disappear randomly.
Increase of the limit to more than 50 would be welcome. Especially when steam workshop offers over 70 000 scenarios ready to be downloaded. I think limit 200 should be enough if infinite is not possible.