Nil Pointer in watchers while running in Arbitrum

[leszko]

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x58 pc=0x7ff75be2a3d5]

goroutine 32836 [running]:
github.com/livepeer/go-livepeer/eth/watchers.(*SenderWatcher).handleBlockEvents(0xc002c89fd0, {0xc000882100, 0x1c, 0x0})
        D:/a/go-livepeer/go-livepeer/eth/watchers/senderwatcher.go:152 +0x55
created by github.com/livepeer/go-livepeer/eth/watchers.(*SenderWatcher).Watch
        D:/a/go-livepeer/go-livepeer/eth/watchers/senderwatcher.go:116 +0x385
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x58 pc=0x7ff75be2c595]

goroutine 33 [running]:
github.com/livepeer/go-livepeer/eth/watchers.(*ServiceRegistryWatcher).handleBlockEvents(0xc000283f80, {0xc000882100, 0x1c, 0x0})
        D:/a/go-livepeer/go-livepeer/eth/watchers/serviceRegistryWatcher.go:61 +0x55
github.com/livepeer/go-livepeer/eth/watchers.(*ServiceRegistryWatcher).Watch(0xc000211e80)
        D:/a/go-livepeer/go-livepeer/eth/watchers/serviceRegistryWatcher.go:49 +0x20a
created by main.main
        D:/a/go-livepeer/go-livepeer/cmd/livepeer/livepeer.go:587 +0x43f8
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x58 pc=0x7ff75be2f355]

goroutine 32748 [running]:
github.com/livepeer/go-livepeer/eth/watchers.(*UnbondingWatcher).handleBlockEvents(0xc002c8ffd0, {0xc000882100, 0x1c, 0x0})
        D:/a/go-livepeer/go-livepeer/eth/watchers/unbondingwatcher.go:74 +0x55
created by github.com/livepeer/go-livepeer/eth/watchers.(*UnbondingWatcher).Watch
        D:/a/go-livepeer/go-livepeer/eth/watchers/unbondingwatcher.go:62 +0x2af