I have been on a business trip this week so my husband took care of our ladies. Apparently both strains do have a sunburn and/or thrips. We treated both with Neem Oil and also placed the cultivation tablet on a towel to get rid of moisture. If they recover the next days we will repot them to a big pot.
The plant stayed mainly inside but we tried to benefit from the sunny weather this week. We took them outside occasionally and we can see that the plant is growing, especially the stem (which seems to be too long). We will now watch and wait how the weather will change. Once it is stable, the plant will be transferred to a pot and stay outdoors.