Burnt smell bits of plastic found inside - LG WM1814CW Front Load Washer

Your washer has a stainless steel spinning inner drum and a two-part plastic outer drum (tub). If the little bits of plastic are tiny enough to flow through the holes in the stainless steel inner drum, they could be an indication that your spider is failing. The spider consists of a steel drive shaft and an aluminium three spoke housing that is bolted on the end of your inner drum. The spider is prone to corrosion and as it fails the inner drum may spin further and further out of true causing contact with the plastic tub. At high speed, the contact will gouge the tub, with friction melting the plastic producing small bits of plastic and a burning smell.
Replacing a spider is a big job but it can be done. The service manual for the CN1814CW can be found on-line and if you live in the States it's easy to get parts but in Canada, LG Canada only permits the sale of cosmetic parts to consumers. Functional parts are only provided to service providers. I did find a part ordering work around by discovering a compatible Kemore washer and ordering the parts from a local Sears part (brick and mortar)department under the Kenmore model number. Unfortunately the parts took over a month to arrive.

A WM1814CW does not have a built-in water heater, so I think your
load may have gotten trapped between the spinning tub and plastic
front tub cover..Roll back the gray gasket to expose and check the
plastic ring for signs of 'friction' burn..As long as the splinters are
trimmed away and doesn't leak water you should be OK..Watch your
loads..Don't Overload!