Planner calculation (last version)

We encounter a logic problem in scheduling tasks. Here is the description of the problem:
Task to be prioritized
• Project Priority: 270
• Predecessor element ending on: 06/02/2020 (# 2192)
• Collab Assignment to project: 30% (without specified start and end dates) - NB: even tested with 100% without change
• Planning mode: as soon as possible
• Collaborator alone on the task
• Task priority: 500 (# 2279)


Task however planned before:
• Project Priority: 300 (# 16)
• Task priority: 500 (# 1957)
• Collab assignment to the project: 100% (all the time)
• Planning mode: as soon as possible

Many of the tasks in this second project are planned before, while the priority project task should be scheduled before.

Would you have a solution? a suggestion?

thanks in advance

Thanks for your reply

No problem to give you more details on task or project concerned
Thank you for describing me the necessary additional information, I send it to you as soon as possible

Hello,

I'm afraid we had a misunderstanding. Indeed, I need you to specify what you expect as additional information to identify the source of the problem. I would be happy to send you these items back.

Thanks