Ensure your cable type matches the termination and be nice and positive with the punchdown tool. I can't terminate without pushing the tool down for 3 clicks. Likely done at the first one but the extra 2 are for certainty
Should be ok with solid. I think the issue comes from trying to use stranded cables as the copper teeth that bite the cable are likely to split the strands and make lose connections.
Are you using solid core cable or stranded?
Ensure your cable type matches the termination and be nice and positive with the punchdown tool. I can't terminate without pushing the tool down for 3 clicks. Likely done at the first one but the extra 2 are for certainty