Command block chains are activating multiple times within a few seconds even with a delay of ticks

I have some command block chains in my realm for a lag clear and some other fun things I'd LIKE to have running so the server doesn't lag and people can get some free stuff. HOWEVER, the lag clear has a delay of ticks which equals 15 minutes of real time... And every time it activates after the 15 minutes, it activates multiple times afterwards within seconds. so it spams the player with the title and play sound commands that are only supposed to be activated every 15 minutes VIA the repeating command block with a 15 minute tick delay (Yes I converted ticks to seconds. I did 15X60 = 900 Thats how many seconds, then I did 900X30 yes this is also extra ticks, that gives 27,000 that is what Is in the command block under "Delay in ticks") I also have MANY other commands that are doing the same thing... I have another chain that tells people in the server how to do certain things every 10 minutes. Yet it will still activate 3-5 times once it finally reaches the 10 minute mark. so the /say command that is in the chain command block activates 3-5 times saying the same thing in chat, ultimatley spamming chat. All of this was working just fine BEFORE the pale garden update. I am really frustrated with this as this is completly stopping me from working on my realm. Because I am not about to release a realm for peopple to play on while commands are bugging out... for the 1000th time. I have had so many problems with realms, atp I dont even know why we have to pay $9 a month for something that never works properly. If you need proof I can provide some but for the love of all that is holy fix bedrock commands please.