Crystal red hatching time

Hello everyone,

I come to you for some hindsight. After some researches it seems Caridina shrimps should hatch within a month.

Now my issue is that I have shrimps since summer and one of them got berried end of October since I noticed the eggs on the 7th on November (1rst video).

I am since then monitoring all that and this shrimp is still carrying the eggs since them. I read that if they were dead she should drop them.

Picture 1: 7 November Picture 2: 21 November Picture 3: 31 December

The tank is set up since February with plants and is inhabited by crystal red since July. Temp is 24 deg Celcius Ph around 7 KH around 4-5 GH between 4 and 7 I am changing around 1/6th of the water every week (including top up from evaporation) The shrimps feed on biofilm and rarely touch any of the shrimp food I give them.

Should I be worried? Or can it happen that a shrimp stays berried for that long?

Thank you very much.