Strange preClover behaviour (Need to press any key to get to clover)

I'm experiencing some strange boot behaviour since a few days. (Unfortunately I dont know what caused this as I'm always keeping kexts etc. up to date.)

Before I get to the clover boot menu I have to press any key. Otherwise it will just stay there with a back square box overlaid to the BIOS boot screen. I already cleared CMOS but it did not change anything. If I put in a separate SSD with a Windows boot loader the "error" is gone so I'm quite sure it's a clover thing.

Something else but I don't know if it's connected to that issue: 50% of the time I can't get to the FileVault password prompt. It just stays at the apple logo. (I'm using the files provided in AppleSupportPkg (2.0.9) for this.)

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Hackintosh System Definition

Build: Z77-DS3H, 16GB, i7-3770 Ivy Bridge, 650W PSU, AMD RX580, LG 4K Screen, latest Clover, iMac 13,2

Kexts:

VirtualSMC.kext

AppleALC.kext

Lilu.kext

WhateverGreen.kext

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Drivers: (FV2 is enabled)

AppleUiSupport.efi

ApfsDriverLoader.efi

AppleGenericInput.efi

AptioMemoryFix.efi

FSInject.efi

HFSPlus.efi

VirtualSmc.efi