<wrn>: bt_hci_core: malformed data in bt_data_parse

[jy-vi]

I've been working with an nrf52833 chip and occasionally I will get spammed in logs with a malformed data warning for a few seconds before the issue disappears on its own. I haven't been able to reproduce this situation reliably and it seems to happen pretty randomly. The below function is where this warning gets logged and it seems to occur before any application callbacks are called.

// located in zephyr/subsys/bluetooth/host/hci_core.c
void bt_data_parse(struct net_buf_simple *ad,
		   bool (*func)(struct bt_data *data, void *user_data),
		   void *user_data)
{
	while (ad->len > 1) {
		struct bt_data data;
		uint8_t len;

		len = net_buf_simple_pull_u8(ad);
		if (len == 0U) {
			/* Early termination */
			return;
		}

		if (len > ad->len) {
			BT_WARN("Malformed data");
			return;
		}

		data.type = net_buf_simple_pull_u8(ad);
		data.data_len = len - 1;
		data.data = ad->data;

		if (!func(&data, user_data)) {
			return;
		}

		net_buf_simple_pull(ad, len - 1);
	}
}

Is this an issue caused by my application code or is it a result of some other device advertising something that my zephyr configuration isn't equipped to handle?