LavaanPlot Floating Circle

Question

I simulated the following data:

library(lavaan)
library(lavaanPlot)

set.seed(2002)

#simulate predictor variables
pred1<- c(1:60)
pred2<- rnorm(60, mean=100, sd=10) 
pred3 <-  .05 + .05*pred1 + rnorm(length(pred1),1,.5) 

#simulate response variables
resp <-  350 -2*pred1 -50*pred3 + rnorm(length(pred1),50,50)

#create df
df <- cbind(resp, pred1, pred3, pred2)

Developed the following model:

#sem model
model <- 
'pred2 ~ pred1
 resp ~ pred1
 resp~ pred3
 pred3 ~ pred1'

Fit the model:

# fit model
fit <- sem(model, data = df) 
summary(fit,rsq = T, fit.measures = TRUE, standardized = TRUE) 

Using the lavaanPlot function I get a floating bubble in the right corner. I would like to know what it means, why it appears and how to remove it from the output diagram.

lavaanPlot(name = "MODEL1", fit, labels = df, coefs = TRUE)