Date flakes

Lately, my ability to get numbers and set dates has improved. Theres a decent few girls however, who will be super flirty and compliant throughout the entire process, set dates, express excitement to meet, respond to the confirmation text of "just checking in, today still work?" With yes. And then, an hour before the date, they block my number or unmatch me on the apps. They don't give any objection. They're super agreeable and into the conversation, and then they disappear an hour before we agreed to meet up. I'm not exactly sure if there's any general rules to follow to limit these situations. The way my texting goes is I open, flirt, tease a date, confirm the date, and then usually the girl and I meet up. I have girls with very low investment that still show up. I don't have all the receipts because I've been blocked, but just know that it was 100% compliance all the way through with no shit tests. Any advice? Do I need to text more to build comfort? Or are these situations unavoidable. I'd say this happens with 1/5 or 1/6 numbers