Strange web like a cocoon taking over hawthorn
The leaves inside Web have gone browntree and bubbly can\'t see spiders
Without photos, there are two possibilities that I can think of: webworms, or giant whitefly.
Fall webworms have a defined but loose web with caterpillars inside.
Giant whitefly has masses of white filaments, something like webbing and there will be small white flying insects fluttering about.