I'm only looking at smtp because using DANE on imap is kinda pointless, I know of no clients using it. I assume the issue is with the incomplete chain, as @Nummer378 told you above.
On smtp it works fine, you just have to add three more records for R12, 13 and 14
## Checking smtp.hoerst.net 152.53.129.213 port 25
DANE TLSA 2 1 1 [2bbad93a..]: OK matched TA certificate at depth 1
DANE TLSA 2 1 1 [6ddac186..]: FAIL did not match any TA certificate
DANE TLSA 3 1 1 [038f8849..]: OK matched EE certificate