Invalid modifier manager compatibility specified

[allthesignals]

Using Ember 5.2 and template-imports...

<div {{observeIntersection this.doSearch}} />

manager.js:621 Uncaught (in promise) Error: Invalid modifier manager compatibility specified
at modifierCapabilities (manager.js:621:1)
at new FunctionalModifierManager (modifier-manager.js:54:104)
at managerFor (modifier.js:14:15)
at CustomModifierManager.getDelegateFor (manager.js:666:1)
at CustomModifierManager.create (manager.js:676:1)
at Object.evaluate (runtime.js:2247:1)
at AppendOpcodes.evaluate (runtime.js:1052:1)
at LowLevelVM.evaluateSyscall (runtime.js:4214:1)
at LowLevelVM.evaluateInner (runtime.js:4185:1)
at LowLevelVM.evaluateOuter (runtime.js:4178:1)