Laravel debugging nightmare!

i'm completely stuck with a laravel issue for hours, really need some help.

• Context: recently deployed a small update to our 'Laravel Quick Fix & Consultation' portal, now getting a weird error on a specific page.
• Problem: a specific Eloquent query seems to be failing intermitently, throwing a general server error instead of a proper Laravel exception. it's making laravel debugging a nightmare.
• Error Snippet:

  [2023-10-27 14:35:12] production.ERROR: Call to undefined method App\Models\Service::findOrCreate() {"exception":"[object] (BadMethodCallException(code: 0): Call to undefined method App\\Models\\Service::findOrCreate() at /var/www/html/app/Http/Controllers/BookingController.php:78)\n[stacktrace]\n#0 /var/www/html/app/Http/Controllers/BookingController.php(78): Illuminate\\Database\\Eloquent\\Model->__call('findOrCreate', Array)"}

• What I've Tried:
  • checked logs (the above is all i get).
  • cleared caches (config, route, view).
  • ran `composer dump-autoload`.
  • checked database connection.
  • reverted the specific code change (still happens sometimes).
• Seeking Advice: any ideas what else could be causing 'Call to undefined method' errors like this, especially when it's intermittent? could it be a deployment issue or something deeper with Eloquent?

thanks in advance!